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- W1525884098 abstract "Crystals of orthorhombic ${mathrm{Sr}}_{14}$${mathrm{Cu}}_{24}$${mathrm{O}}_{41}$ are semiconducting, with an activation energy of 0.18(2) eV for conduction along c, the direction lying parallel to both the (${mathrm{Cu}}_{2}$${mathrm{O}}_{3}$) planes and the (${mathrm{CuO}}_{2}$) chains. The magnetic susceptibility above 80 K follows a Curie-Weiss law with ensuremath{theta}=-95 K and ${p}_{mathrm{eff}}$=0.65${ensuremath{mu}}_{B}$/Cu in the ac plane and ensuremath{theta}=-190 and ${p}_{mathrm{eff}}$=0.94${ensuremath{mu}}_{B}$/Cu along b, the direction perpendicular to the (${mathrm{Cu}}_{2}$${mathrm{O}}_{3}$) planes and the (${mathrm{CuO}}_{2}$) chains. There is an indication of antiferromagnetic order below ${T}_{N}$=60 K, and a Curie contribution at low temperature due to localized free spins [0.4(1) with S=(1/2 per formula]. The specific heat measured in the range 2--12 K is of the form ${mathrm{AT}}^{mathrm{ensuremath{-}}2}$+ensuremath{gamma}T+ensuremath{beta}${T}^{3}$, where A=1080 mJ K/mole, ensuremath{gamma}=100 mJ/mole ${mathrm{K}}^{2}$, and ensuremath{beta}=5.93 mJ/mole ${mathrm{K}}^{3}$. A 5-T magnetic field greatly enhances the low-temperature specific heat, an effect which is attributed to the localized states with S=(1/2. The linear term is attributed to a localized density of states with no net spin, possibly associated with peroxide ions. The relevance of these results to the low-temperature specific heat of copper-oxide superconductors is discussed." @default.
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- W1525884098 date "1989-07-01" @default.
- W1525884098 modified "2023-10-16" @default.
- W1525884098 title "Electronic properties ofSr14Cu24O41" @default.
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- W1525884098 doi "https://doi.org/10.1103/physrevb.40.825" @default.
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